
.nodetext {
    font: 12px sans-serif;
    -webkit-user-select:none;
    -moze-user-select:none;
    stroke-linejoin:bevel;
}
:not(:hover) .nodetext {
    display: none;
}

/* 特定id的css*/
#mainContainer{
    margin-left: auto;
    margin-right: auto;
    width:850px;
}

#option{
    float:left;
    width:200px;
    height:500px;
    position:relative;
    margin:10px;
}

#container{
    float:left;
    width:100%;
    height:400px;
    position:relative;
    margin:10px;
}